I am lvl 100 and I do between lvl 108 to 113 missions. This was a lvl 110 mission. Unfortunately he got me in the arch of a doorway both times, the walls were in the way of getting a good look, and he was a good bit in the room.. If I run into him again, I will make sure to mark down everything about him. It didn't don on me to report it till a few mission later after I thought about just how much damage he must of done to do that to me..  From what I did see he was one of the ones who wore armor and wasn't misshapen. 

All my Resistance are maxed and at any one time I have a +40% supreme damage reduction on top of it going on. so above 70% damage reduction.... I do lvl 113 missions for a challenge if that tells you anything. Lvl 110 is medium difficulty for me. If it wasn't for the constant warp spawn champions hunting me down in groups all the time, because I play in unhinged warp heat, I could more than likely do lvl 115 and up. The warp spawn champions are usually by far the most dangerous thing on the board for me as they are always atleast 3 and sometimes up to a dozen.... So a board mini boss doing that kind of damage is crazy.   

That actually brings me to another topic. If yall wouldn't mind considering weighting the warp anomalies a bit. The mob spawns on the warp anomalies can get out of hand. My build specializes in cooldown reduction so I can throw spells like crazy. Which mean I get warp anomalies like crazy, which I don't mind, because I also specialize in movement to keep away from them. Price of playing unhinged. The mob spawns though get out of hand as their is a constant stream of champion level enemies in ever fight and at least 3, if not up to a dozen and they keep coming as long as I keep fighting. Maybe put a max number of them allowed to be spawned and on the board at any one time. 3 to 6 I can handle, but once they start reaching numbers beyond that it gets a bit crazy with all the DOTs. 90% of my deaths are from the warp spawn champions and I would say over 75% of those are from plagueridden guardians DOTs being stacked multiple times, one on top of another. Maybe just tone down the DOTS from the guardians or make it so they don't stack or put a limit on how many can stack Just food for thought.     

Example of what I am talking about, these are just the Mobs that spawned after I killed the last boss..... I killed the couple that spawned during the boss fight and that fight spawned these.

https://drive.google.com/file/d/1wX1iaC-wXMgH8Q3hbm_WEf3860fiubpT/view?usp=sharing

They are making good headway I would say. The Devs listen bud as long as you provide data to support what you are talking about. I did some research, presented it, and they are making changes. Which is more than a good portion of the game dev teams out there do. Cut them some slack bud :) At least they are listening and trying to help the fan base.